(19)
(11) EP 0 385 494 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.08.1991 Bulletin 1991/35

(43) Date of publication A2:
05.09.1990 Bulletin 1990/36

(21) Application number: 90104086.5

(22) Date of filing: 02.03.1990
(51) International Patent Classification (IPC)5: B30B 11/00
(84) Designated Contracting States:
DE FR GB

(30) Priority: 02.03.1989 JP 51695/89

(71) Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO
Kobe 651 (JP)

(72) Inventors:
  • Uehara, Katsuhiro
    Kobe-shi, Hyogo-ken (JP)
  • Kurita, Masanori
    Kobe-shi, Hyogo-ken (JP)
  • Murakami, Masakazu
    Kobe-shi, Hyogo-ken (JP)

(74) Representative: Türk, Gille, Hrabal, Leifert 
Brucknerstrasse 20
40593 Düsseldorf
40593 Düsseldorf (DE)


(56) References cited: : 
   
       


    (54) Interlock system for isostatic forming press


    (57) Described herein is an interlock system for an isostatic press machine of the type including a high pressure container having upper and lower closure plugs releasably in upper and lower openings to be used for loading and unloading work therethrough, and a holder frame for supporting the axial force of the container in an isostatic pressing phase of the press operation, the holder frame being pivotally supported at one side thereof for swinging movements about a vertical axis into and out of a holding position in engagement with the high pressure container, characterized in that the interlock system is provided with a lock mechanism constantly urged to lock the holder frame in the holding position, and a control means adapted to control the lock mechanism to maintain the lock on the holder frame when the internal pressure of the high pressure container is higher than a predetermined level and to release the lock when lower than the predetermined level.







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